Method for transmitting messages in an elevator communications system
US5551532A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1994 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Feb 28, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B2201/233
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In a two-way ring elevator communications system, characterized in that a controller is associated with each elevator to process inter-elevator messages and the controllers of the elevators are linked together in serial fashion on a two-way communications system so that the messages of each controller are passed along to and processed by each of the other controllers in two directions on two independent rings, whichever of the two rings is properly functioning is used at full capacity but if neither ring is properly functioning then both rings are operated at reduced capacity, the reduction being carried out by reducing the time between reassignments of elevator hall calls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.